数据搜索系统,热门电子元器件搜索 |
|
UC2854 数据表(PDF) 1 Page - Texas Instruments |
|
|
UC2854 数据表(HTML) 1 Page - Texas Instruments |
1 / 9 page 6/98 BLOCK DIAGRAM • Control Boost PWM to 0.99 Power Factor • Limit Line Current Distortion To <5% • World-Wide Operation Without Switches • Feed-Forward Line Regulation • Average Current-Mode Control • Low Noise Sensitivity • Low Start-Up Supply Current • Fixed-Frequency PWM Drive • Low-Offset Analog Multiplier/Divider • 1A Totem-Pole Gate Driver • Precision Voltage Reference The UC1854 provides active power factor correction for power sys- tems that otherwise would draw non-sinusoidal current from sinusoi- dal power lines. This device implements all the control functions necessary to build a power supply capable of optimally using available power-line current while minimizing line-current distortion. To do this, the UC1854 contains a voltage amplifier, an analog multiplier/divider, a current amplifier, and a fixed-frequency PWM. In addition, the UC1854 contains a power MOSFET compatible gate driver, 7.5V ref- erence, line anticipator, load-enable comparator, low-supply detector, and over-current comparator. The UC1854 uses average current-mode control to accomplish fixed- frequency current control with stability and low distortion. Unlike peak current-mode, average current control accurately maintains sinusoidal line current without slope compensation and with minimal response to noise transients. The UC1854’s high reference voltage and high oscillator amplitude minimize noise sensitivity while fast PWM elements permit chopping frequencies above 200kHz. The UC1854 can be used in single and three phase systems with line voltages that vary from 75 to 275 volts and line frequencies across the 50Hz to 400Hz range. To reduce the burden on the circuitry that supplies power to this device, the UC1854 features low starting supply current. These devices are available packaged in 16-pin plastic and ceramic dual in-line packages, and a variety of surface-mount packages. UC1854 UC2854 UC3854 High Power Factor Preregulator FEATURES DESCRIPTION UDG-92055 |
类似零件编号 - UC2854 |
|
类似说明 - UC2854 |
|
|
链接网址 |
隐私政策 |
ALLDATASHEETCN.COM |
ALLDATASHEET是否为您带来帮助? [ DONATE ] |
关于 Alldatasheet | 广告服务 | 联系我们 | 隐私政策 | 链接交换 | 制造商名单 All Rights Reserved©Alldatasheet.com |
Russian : Alldatasheetru.com | Korean : Alldatasheet.co.kr | Spanish : Alldatasheet.es | French : Alldatasheet.fr | Italian : Alldatasheetit.com Portuguese : Alldatasheetpt.com | Polish : Alldatasheet.pl | Vietnamese : Alldatasheet.vn Indian : Alldatasheet.in | Mexican : Alldatasheet.com.mx | British : Alldatasheet.co.uk | New Zealand : Alldatasheet.co.nz |
Family Site : ic2ic.com |
icmetro.com |